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13900KF + B760-F + Hynix A-die – 7600 boots but not TM5 stable, currently stable lower – advice on next steps?
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13900KF + B760-F + Hynix A-die – 7600 boots but not TM5 stable, currently stable lower – advice on next steps?

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CPU: i9-13900KF  
Motherboard: ASUS ROG Strix B760-F Gaming WiFi  
RAM: Corsair Vengeance (Hynix A-die, 2x16GB)

Goal:
Trying to push stable tighten timings further at a slightly lower frequency.

Current stable:
7000 mhz
Timings: 34 42 42 96 (XMP timings)
DRAM Voltage: 1.48V  
TM5: Stable 

Unstable attempt:
7600 MHz
Timings: 34-42-42-96
Voltage: 1.48V
Boots into Windows but fails TM5

Unstable attempt:
7200 MHz
Timings: 32-42-42-96
Voltage: 1.48V
Boots into Windows but fails TM5

What I tried:


Questions:
1. Is this likely IMC limited on a 13900KF or should I be able to stabilize 7600?
2. Should I push DRAM voltage higher (1.5–1.55V) for A-die or focus on loosening timings?
3. Which timings usually block stability first at this range (tRCD/tRP?) 
4. Would tuning VCCSA/VCCIO help here on B760?

Screenshots:
( MemTweakIt + AIDA64 + Cpuz)